Barcode Scanner Shield acts as Arduino Shield via 1Sheeld

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Turn your smartphone into a Barcode Scanner shield for Arduino. Barcode Scanner library allows your phone to scan various type of barcodes (1D/2D)and return the data back to do certain actions.

This shield is one of the special shields. Special shields allows your Arduino board to use some capabilities your smartphone can do, like playing music, taking a picture, getting notifications, accessing the clock data and using the touch screen for various functions. Learn more from the special shields tutorial.

Also in 1Sheeld

Barcode Scanner library allows your phone to read 1D/2D codes and take certain actions according the readings.

Adding #define CUSTOM_SETTINGS along with #define INCLUDE_BARCODE_SCANNER_SHIELD is a key that will let you unlock BarcodeScanner shield only amongst all shields and prevent 1Sheeld library from eating your memory especially for UNO board.

Note

– Barcode Scanner support only these formats (UPC_A,UPC_E,EAN8,EAN13,CODE39,CODE93,CODE128,PDF417,QRCODE,AZTEC,ITF,ITF14,DATA_MATRIX).
– There’s an implicit delay in the app between each scan of max (2sec).
– When code first scanned Barcode scanner shield sends the first 128 character or less, while if code holds more than 128 character, then you will have to query the next characters using the query function queryNextDataBytes (explained), if less than 128 character it will all be sent once and you won’t have to query any more bytes.
– For more information about Barcode check the Wiki link.
– 2D barcodes coded to several categories for example the QR code supports (URL’s,business cards..etc) check the link here for more information, also check this link which generates most types of barcodes(1D&2D).
– This Shield is currently supported by IOS application.

 

 bool isNewBarcodeScanned(void)

Check if a new barcode scanned.

SYNTAX
BarcodeScanner.isNewBarcodeScanned();

RETURNS
Returns a Yes ‘1’ or No ‘0’.

PARAMETERS
None.

USAGE
BarcodeScanner.isNewBarcodeScanned();

 

bool isFullySent(void)

Check if the data of code is fully sent.(used specially if code has more than 128 character)

SYNTAX
BarcodeScanner.isFullySent();

RETURNS
Returns a Yes ‘1’ or No ‘0’.

PARAMETERS
None.

USAGE
BarcodeScanner.isFullySent();

 

bool isNextDataBytesReceived(void)

Check if the incoming data is the next characters of the scanned code. (used specially when query for next characters function invoked)

SYNTAX
BarcodeScanner.isNextDataBytesReceived();

RETURNS
Returns a Yes ‘1’ or No ‘0’.

PARAMETERS
None.

USAGE
BarcodeScanner.isNextDataBytesReceived();

 

byte getFormat(void)

Returns scanned code format type.

Literals

UPC_A= 0x01
UPC_E= 0x02
EAN8= 0x03
EAN13= 0x04
CODE39= 0x05
CODE93= 0x06
CODE128= 0x07
PDF417= 0x08
QRCODE= 0x09
AZTEC= 0x0A
ITF= 0x0B
ITF14= 0x0C
DATA_MATRIX= 0x0D

SYNTAX
BarcodeScanner.getFormat();

RETURNS
Returns a byte illustrates the format of scanned code.

PARAMETERS
None.

USAGE
byte formatType = BarcodeScanner.getFormat();

 

byte getCategory(void) (for 2D codes)

Returns 2D scanned code category type.

Literals

NO_CATEGORY= 0x00,
CODE_URL= 0x01,
CODE_TXT= 0x02,
CODE_EMAIL= 0x03,
CODE_VCARD= 0x04,
CODE_SMS= 0x05,
CODE_CALL= 0x06,
CODE_GEO= 0x07,
CODE_WIFI= 0x08,
CODE_EVENT= 0x09

SYNTAX
BarcodeScanner.getCategory();

RETURNS
Returns a byte holding the catergory of 2D scanned code.

PARAMETERS
None.

USAGE
byte categoryType= BarcodeScanner.getCategory();

 

byte getDataLength(void)

Returns number of characters read.(Max 128 characters)
Note:
if code has more than 128 character use queryNextbytes function. also check official example for more demonstration.

SYNTAX
BarcodeScanner.getDataLength();

RETURNS
Returns a byte holding number of data characters.

PARAMETERS
None.

USAGE
byte dataLength= BarcodeScanner.getDataLength();

 

int getMaxDataLength(void)

Returns max number of characters barcode holds.

SYNTAX
BarcodeScanner.getMaxDataLength();

RETURNS
Returns a byte holding maximum number of data characters.

PARAMETERS
None.

USAGE
int maxDataLength= BarcodeScanner.getMaxDataLength();

 

char * getData(void)

Returns read characters from code.(128 max per scan if code holds more than 128,use queryNextDataBytes to get the rest characters)

SYNTAX
BarcodeScanner.getData();

RETURNS
Returns a char array holding data.

PARAMETERS
None.

USAGE
char * myData= BarcodeScanner.getData();

 

void queryNextDataBytes(byte)

Queries next data characters from old scanned code.(used only if code holds more than 128 characters)

SYNTAX
BarcodeScanner.queryNextDataBytes(byte=128);

RETURNS
None.

PARAMETERS
Takes a byte holding number of bytes needed with the max of 128 characters(Default 128).

USAGE
BarcodeScanner.queryNextDataBytes();

 

void queryParameterValue(const char *) (2D code)

Queries specific parameter data from a 2D scanned code.
Note:
– Check official examples for more demonstration.
– Each 2D category has it’s own parameters:
1- CODE_URL:”url”
2- CODE_TXT:”txt”
3- CODE_EMAIL:”mailto”,”subject”,”body”
4- CODE_VCARD:”N”,”FN”,”ORG”,”TITLE”,
“TEL;WORK;VOICE”,”TEL;HOME;VOICE”,”ADR;WORK;PREF”,”LABEL;WORK;PREF”,”ADR;HOME”,
“LABEL;HOME”,”EMAIL”,”REV”,”GENDER”,”NICKNAME”,”GEO”,”BDAY”
5- CODE_SMS:”body”,”number”
6- CODE_CALL:”tel”
7- CODE_GEO:”latitude”,”longitude”
8- CODE_WIFI:”T” (authentication type),”S”(SSID name),”P” (password),”H”(Hidden)
9- CODE_EVENT:”SUMMARY”,”DESCRIPTION”,”LOCATION”,”DTSTART”,”DTEND”

SYNTAX
BarcodeScanner.queryParameterValue(“FN”);

RETURNS
None.

PARAMETERS
Takes a char array holding parameters.

USAGE
BarcodeScanner.queryParameterValue("tel");

 

void setOnNewBarcodeScanned(void (*userFunction)(byte,byte,int,char*))

Sets a certain individual function coded by the user in the sketch to be called and runs its functionality once a new code is is scanned.

SYNTAX
BarcodeScanner.setOnNewBarcodeScanned(&userFunctionName);

RETURNS
None.

PARAMETERS
&userFunctionName: takes the physical address of the userFunction in the memory and jump to it once called to execute it’s functionality.

USAGE
BarcodeScanned.setOnNewBarcodeScanned(&newScannedFunction);
/* On new barcode scanned function. */
void newScannedFunction(byte format,byte category,int maxLength,char * data)
{
 /* Check if the code scanned is a QR code or a Data matrix code. */
 if(format == QRCODE || format == DATA_MATRIX)
 {
 /* Check if the code scanned with email category type. */
 if(category == CODE_EMAIL)
 {
 /* Terminal line for debugging. */
 Terminal.println("Entered");
 /* Query parameters from barcode scanner. */
 BarcodeScanner.queryParameterValue("mailto");
 BarcodeScanner.queryParameterValue("subject");
 BarcodeScanner.queryParameterValue("body");
 }
 }
}

 

void setOnNextDataResponse(void (*userFunction)(byte,char *))

Sets a certain individual function coded by the user in the sketch to be called and runs its functionality once the queried next bytes received.

SYNTAX
BarcodeScanner.setOnNextDataResponse(&userFunctionName);

RETURNS
None.

PARAMETERS
&userFunctionName: takes the physical address of the userFunction in the memory and jump to it once called to execute it’s functionality.

USAGE
BarcodeScanned.setOnNextDataResponse(&nextData);
/* On new barcode scanned function. */
void nextData(byte dataLength,char * data)
{
   Terminal.println(data);
}

 

void setOnParameterValueResponse(void (*userFunction)(char*,char*))

Sets a certain individual function coded by the user in the sketch to be called and runs its functionality once the queried parameter received.

SYNTAX
BarcodeScanner.setOnParameterValueResponse(&userFunctionName);

RETURNS
None.

PARAMETERS
&userFunctionName: takes the physical address of the userFunction in the memory and jump to it once called to execute it’s functionality.

USAGE
BarcodeScanned.setOnParameterValueResponse(&getParameter);
/* On new barcode scanned function. */
void getParameter(char * parameter,char * value)
{
   Terminal.println(value);
}

 

void setOnError(void (*userFunction)(byte))

Sets a certain individual function coded by the user in the sketch to be called and runs its functionality once an error occurs when code is scanned.
Literals:
BARCODE_NOT_SUPPORTED
BARCODE_SCANNING_ERROR
WRONG_PARAMETER
NOT_ENOUGH_BYTES
CATEGORY_NOT_SUPPORTED

SYNTAX
Barcode.setOnError(&userFunctionName);

RETURNS
None.

PARAMETERS
&userFunctionName: takes the physical address of the userFunction in the memory and jump to it once called to execute it’s functionality.

USAGE
/* Subscribe to setOnError. */
BarcodeScanner.setOnError(&errorFunction);
/* errorFunction exists under the loop function. */
/* This function will be invoked if an error occurrs.*/
void errorFunction(byte errorData)
{
 /* Switch on error and print it on the terminal. */
 switch(errorData)
 {
 case BARCODE_NOT_SUPPORTED: Terminal.println("Barcode not supported");break;
 case BARCODE_SCANNING_ERROR: Terminal.println("Barcode scanning Error");break;
 case WRONG_PARAMETER: Terminal.println("Wrong parameter");break;
 case NOT_ENOUGH_BYTES: Terminal.println("No enough bytes");break;
 case CATEGORY_NOT_SUPPORTED: Terminal.println("Category not supported");break;
 }
}